EP 2143478 A1 20100113 - EXHAUST PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE
Title (en)
EXHAUST PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE
Title (de)
ABGASREINIGER FÜR EINEN VERBRENNUNGSMOTOR
Title (fr)
DISPOSITIF DE PURIFICATION D'UN GAZ D'ÉCHAPPEMENT POUR UN MOTEUR À COMBUSTION INTERNE
Publication
Application
Priority
- JP 2008058682 W 20080501
- JP 2007123380 A 20070508
Abstract (en)
In an internal combustion engine, an NO X selective reducing catalyst (15) is arranged in an engine exhaust passage. Aqueous urea is fed from an aqueous urea feed valve (17) into the NO X selective reducing catalyst (15) to selectively reduce the NO X contained in the exhaust gas with the ammonia generated from the aqueous urea. The moisture contained in the exhaust gas is recovered and stored in a water tank (21). It is provided with a high concentration aqueous urea tank (22) storing high concentration aqueous urea having a higher urea concentration than the urea concentration of the aqueous urea fed to the NO X selective reducing catalyst (15), and the high concentration aqueous urea is diluted with the recovered moisture thereby generating aqueous urea fed to the NO X selective reducing catalyst (15).
IPC 8 full level
B01D 53/90 (2006.01); B01D 53/94 (2006.01); F01N 3/20 (2006.01)
CPC (source: EP US)
B01D 53/90 (2013.01 - EP US); B01D 53/9459 (2013.01 - EP US); F01N 3/2066 (2013.01 - EP US); B01D 53/9418 (2013.01 - EP US); B01D 53/944 (2013.01 - EP US); B01D 53/9477 (2013.01 - EP US); B01D 2251/2067 (2013.01 - EP US); B01D 2255/1021 (2013.01 - EP US); B01D 2255/50 (2013.01 - EP US); B01D 2255/90 (2013.01 - EP US); B01D 2257/404 (2013.01 - EP US); B01D 2257/406 (2013.01 - EP US); B01D 2257/702 (2013.01 - EP US); F01N 2240/22 (2013.01 - EP US); F01N 2610/02 (2013.01 - EP US); F01N 2610/1406 (2013.01 - EP US); Y02A 50/20 (2017.12 - EP US); Y02T 10/12 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 2143478 A1 20100113; EP 2143478 A4 20120418; CN 101959579 A 20110126; CN 101959579 B 20130731; JP 2008280856 A 20081120; JP 4888216 B2 20120229; US 2010031640 A1 20100211; US 8250856 B2 20120828; WO 2008136538 A1 20081113
DOCDB simple family (application)
EP 08752565 A 20080501; CN 200880006650 A 20080501; JP 2007123380 A 20070508; JP 2008058682 W 20080501; US 51748508 A 20080501